Funding for this research was provided by:
Ministry of Health, Labour and Welfare
Received: 23 May 2018
Accepted: 18 July 2018
First Online: 30 July 2018
Ethics approval and consent to participate
: The study protocol was approved by the Nagasaki Rosai Hospital Institutional Research and Ethics Committee on 27 June 2016 (No. 28007). Written informed consent was obtained from each participant.
: Not applicable.
: The authors declare that they have no competing interests.
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